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A205953
Number of (n+1) X 7 0..3 arrays with no 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors or the same number of counterclockwise edge increases as its vertical neighbors.
0
10876432, 583496376, 36783376600, 2915195222352, 273204243466080
OFFSET
1,1
COMMENTS
Column 6 of A205954.
EXAMPLE
Some solutions for n=4:
..2..2..0..2..3..3..0....1..0..3..2..3..3..0....2..0..3..0..1..3..2
..1..2..1..2..0..1..1....0..2..2..3..3..3..1....0..1..1..3..2..0..0
..2..3..3..2..3..1..1....0..2..2..1..2..0..0....0..1..1..0..1..0..2
..3..3..3..1..3..0..3....0..1..3..3..2..3..2....1..2..0..3..2..3..0
..3..3..2..1..2..0..2....2..1..2..0..1..1..2....1..1..1..2..1..0..0
CROSSREFS
Sequence in context: A233621 A151909 A205664 * A205464 A374779 A202470
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 02 2012
STATUS
approved